Because of its exceptionally bright nucleus, NGC 5750 is listed as a Seyfert galaxy (type Sy2). Based on a recessional velocity of 1685 km/sec, it is about 80 million light years away, but redshift-independent distance estimates range from 100 to 120 million light years, so the actual distance is very uncertain. Using a distance of 100 million light years, the galaxy's apparent size of 2.85 by 1.15 arcmin would correspond to 85 thousand light years.

Apparent size 1.5 by 0.8 arcmin.

Based on a recessional velocity of 4540 km/sec, NGC 5752 is about 210 million light years away. Given that and its apparent size of 0.75 by 0.4 arcmin, it is about 45 thousand light years across.It is part of a gravitationally interacting pair with NGC 5754 (which see for images), with which it comprises the closer half of Arp 297.

Based on a recessional velocity of 9625 km/sec, NGC 5753 is about 450 million light years away. Given that and its apparent size of 0.6 by 0.5 arcmin, it is about 80 thousand light years across. At the same distance as NGC 5755, with which it comprises the more distant half of Arp 297.

Based on a recessional velocity of 4560 km/sec, NGC 5754 is about 210 million light years away. Given that and its apparent size of 1.25 by 1.15 arcmin, it is about 75 thousand light years across.NGC 5754 is gravitationally interacting with its smaller companion NGC 5752, with which it comprises the closer half of Arp 297. As a result of the interaction, the larger galaxy has wide outer arms, and a long trail of stellar debris seems to extend well off to the west of the pair.

Based on a recessional velocity of 9660 km/sec, NGC 5755 is about 450 million light years away. Given that and its apparent size of 1.3 by 1.0 arcmin, it is about 170 thousand light years across. Although in the same general direction as the interacting pair NGC 5754 and 5752, NGC 5755 has no connection to those galaxies, being over twice as far away. Despite that, it is considered a part of galaxy quartet Arp 297, as Arp's catalog was based only on the visual appearance of galaxies and groups of galaxies, and not whether they were actually physically related to each other. However, as indicated by its distorted shape, NGC 5755 probably is interacting with NGC 5753, which is at about the same distance. So Arp 297 does consist of a quartet of physically interacting galaxies — just two completely separate pairs, instead of four directly interacting galaxies.

Based on a recessional velocity of 2675 km/sec, NGC 5757 is about 125 million light years away, in good agreement with a redshift-independent distance estimate of 130 million light years. Given that and its apparent size of 2.1 by 1.7 arcmin, it is about 75 thousand light years across. NED lists the galaxy as a member of a galaxy pair, presumably with PGC 52846, the edge-on spiral galaxy to its southeast, which is about the same distance from us.

Based on a recessional velocity of 8310 km/sec, NGC 5759 is about 390 million light years away. Given that and its apparent size of 1.1 by 0.5 arcmin, it is about 125 thousand light years across. It is in a gravitationally interacting pair with PGC 200319, which is undoubtedly responsible for its chaotic appearance.

Based on a recessional velocity of 8540 km/sec, PGC 200319 is about 400 million light years away. Given that and its apparent size of 0.25 by 0.2 arcmin, it is about 30 thousand light years across. It is in a gravitationally interacting pair with NGC 5759 (which see for images), so despite the difference in the galaxies' recessional velocities, they must be at essentially the same distance.

Per Dreyer, NGC 5765 (= GC 3997, 1860 RA 14 43 52, NPD 84 18.0) is a "double nebula, both extremely faint". The two nebulae are usually referred to as NGC 5765 and 5765B, or as NGC 5765A and 5765B. Physical data for the second galaxy is listed immediately following this entry. Historical information and physical data for the first galaxy will be posted at this entry. Apparent size 0.7 by 0.3 arcmin (ignoring the extended tail caused by the gravitational interaction of the galaxies).

The second member of the pair of galaxies listed as NGC 5765, which see for images. Apparent size 0.9 by 0.3 arcmin.

Apparent size 0.9 by 0.7 arcmin.